Swivel base assembly with fore/aft/rotational movement and warping features

Abstract

Systems and methods for swivel base assemblies for seats are provided. A swivel base assembly for an aircraft seat may comprise a swivel center beam, a swivel plate pivotally coupled to the swivel center beam, the swivel plate configured to rotate with respect to the swivel center beam about a first centerline axis, a first side rail coupled to the swivel center beam, and a second side rail coupled to the swivel center beam, the swivel center beam being located between the first side rail and the second side rail.

What is claimed is: 
     
       1. A swivel base assembly for an aircraft seat, comprising:
 A swivel center beam; 
 a swivel plate pivotally coupled to the swivel center beam, the swivel plate configured to rotate with respect to the swivel center beam about a first centerline axis; 
 a first side rail coupled to the swivel center beam; 
 a second side rail coupled to the swivel center beam, the swivel center beam being located between the first side rail and the second side rail; and 
 wherein a track lug is pivotally coupled to the first side rail, the track lug configured to retain the first side rail in a track and translate along the track. 
 
     
     
       2. The swivel base assembly of  claim 1 , wherein a track pin is coupled to the first side rail, the track pin configured to prevent the first side rail from translating along the track in response to the track pin being in an extended position. 
     
     
       3. The swivel base assembly of  claim 2 , wherein a swivel stud foot is coupled to the swivel center beam and the first side rail comprises a slot, the swivel stud foot configured to pass through the slot in response to the swivel plate rotating about the first centerline axis. 
     
     
       4. The swivel base assembly of  claim 3 , wherein the swivel center beam defines a center aperture comprising the first centerline axis, a pivot coupled between the center aperture and the swivel plate. 
     
     
       5. The swivel base assembly of  claim 4 , wherein the swivel center beam comprises:
 a center body; 
 a first member extending from the center body having a first aperture for receiving a first sliding bar for coupling the first member to the first side rail; 
 a second member extending from the center body having a second aperture for receiving a second sliding bar for coupling the second member to the first side rail; 
 a third member extending from the center body having a third aperture for receiving a first fastener for attaching the third member to the second side rail; and 
 a fourth member extending from the center body having a fourth aperture for receiving a second fastener for attaching the fourth member to the second side rail. 
 
     
     
       6. The swivel base assembly of  claim 5 , wherein the first aperture comprises a second centerline axis, the second centerline axis being perpendicular with the first centerline axis. 
     
     
       7. The swivel base assembly of  claim 6 , wherein the first member is configured to receive a pin for retaining the first sliding bar at least partially within the first aperture. 
     
     
       8. The swivel base assembly of  claim 7 , wherein the pin extends in a direction being perpendicular with the second centerline axis. 
     
     
       9. The swivel base assembly of  claim 8 , wherein the pin is configured to shear in response to the swivel center beam moving relative to the first side rail in a direction along the second centerline axis. 
     
     
       10. The swivel base assembly of  claim 5 , wherein the center body, the first member, the second member, the third member, and the fourth member comprise a single, monolithic member. 
     
     
       11. A swivel center beam for an aircraft seat base assembly, comprising:
 A center body defining a center aperture having a first centerline axis; 
 a first member extending from the center body having a first aperture for receiving a first sliding bar for coupling the first member to a first side rail; 
 a second member extending from the center body having a second aperture for receiving a second sliding bar for coupling the second member to the first side rail; 
 a third member extending from the center body having a third aperture for receiving a first fastener for attaching the third member to a second side rail; 
 a fourth member extending from the center body having a fourth aperture for receiving a second fastener for attaching the fourth member to the second side rail; 
 wherein the first member is configured to receive a pin for retaining the first sliding bar at least partially within the first aperture; and 
 the pin is configured to shear in response to the swivel center beam moving relative to the first side rail. 
 
     
     
       12. The swivel center beam of  claim 11 , wherein the first aperture comprises a second centerline axis, the second centerline axis being perpendicular with the first centerline axis. 
     
     
       13. The swivel center beam of  claim 12 , wherein the pin extends in a direction being perpendicular with the second centerline axis. 
     
     
       14. The swivel center beam of  claim 13 , wherein the pin is configured to shear in response to the swivel center beam moving relative to the first side rail in a direction along the second centerline axis. 
     
     
       15. The swivel center beam of  claim 11 , wherein the center body, the first member, the second member, the third member, and the fourth member comprise a single, monolithic member. 
     
     
       16. A method of manufacturing a swivel base assembly for an aircraft seat, comprising:
 coupling a first end of a first sliding bar to a side rail; 
 positioning a second end of the first sliding bar into a first aperture disposed in a swivel center beam; 
 positioning a pin, the pin extending at least partially into a second aperture disposed in the swivel center beam and into an aperture disposed in the first sliding bar; and 
 wherein the pin is configured to shear in response to the side rail moving with respect to the swivel center beam. 
 
     
     
       17. The method of  claim 16 , wherein the coupling the first end is performed by bolting the first end to the side rail.